Device for use in wells



June 4, 1940.

E. B. HALL El' AL DEVICE F012 USE IN WEL Filed April 2l, 1936 2Sheets-Sheet 1 f aan.

June 4, 1940.

E. B. HALL ErAL DEVICE FOR' USE IN WELLS Filed lApril 2l', 1936 2Sheets-Sheet 2 Patented June 4, 1940 i PATENTl OFFICE 2,203,595 enEvIcE'roa USE 1N WELLS Elwin B. Hall, Los Angeles,

and Arthur L.

I Armcntront, Santa Maria, Calif., assignors, by

' direct and mesne assignments,

to Security Engineering Co. Inc., a corporation of CaliforniaApplication April 21, 193s, serial No. 75,564'

13 Claims.

This invention relates to a device or appliance for use in wells and itis a general object of the invention to provide a. simple, practical andimproved device for facilitating the manipulation and operation of welltools.

Another object of this invention is to provide a device for connectingor associating a well tooly 15 invention is adapted to be employed inconnection with well tools of various characters, for example, it may beemployed with drilling tools, fishing tools, testing tools, etc. We willherein disclose the device or appliance of the present inventionemployed or combined with a well testing apparatus,

it being understood that the invention is not to be construed asrestricted by this specific typica application of the linvention.

Another object of this invention is to provide an apparatus to be runinto the well on a tubular test string and that embodies means wherebythe string may be rotated and/or reciprocated in the well and, ifdesired, circulationl may be maintained 'to keep the string free forready removal 3o from the well. The well testers heretofore introducedusually embodya tubular test string connected with the tester and packerproper by al non-rotatable connection. TheV heavy hydrostatic 'pressuresin a'well force the packer or tester' against the formation topositively hold the tester against movement during the test. When l thetest string is connected with the tester by a threaded connection orother usual means under the present practice, no circulation ismaintained 40 and it is not possible to rotate the string during thetest. `Often a well test is of considerable duration and the mud orsolid matter in the well fluid settles about the test string and muds itor freezes it in the well, making it difiicult and sometimes impossibleto remove the string or theY tester'` at the conclusion of thetest. Theapparatus of the present invention embodies a swivel or rotatableconnection and a circulation 50 uiddischarging means whereby the teststring may be rotated and/or reciprocated as found necessary during thetest, and circulation fluid may be continuously discharged into the wellad- 1 jacent the tester to `prevent the string from becoming frozen inthe well so that a test of long duration may be made without danger ofthe apparatus becoming frozen inthe well bore.

Another object of this invention is to provide a well device of thecharacter mentioned that is such that the tester or other tool may befully 5 controlled, turned, jarred or otherwise manipulated in the well,as found necessary.

Another object of this invention is to provide a well tester embodying arotatable connection between the test string and the tester proper thatl0 may be clutched or engaged at the termination of the test to allowthe test string carrying the rotatable connection to be unthreaded orreleased from the tester proper and withdrawn from the well. e

Another object of this invention is to provide ,a well tester of thecharacter mentioned embodying ,a drillable or friable screen or linerthat may be readily drilled up at the end of the test and following thedisconnectionl of the test strings from 20 the tester leaving the wellbore free and open for other operations.

Another object of this invention -is to provide a well testing apparatuscomprising the combination of a drillable packer, a drillable liner, atest string for receiving the test iiuid, a circulation string formaintaining circulation in the well and a rotatable connection betweenthe tester and the said `strings whereby the strings may be turned`and/or reciprocated and maintainedfree during I0 a long test while thetester remains stationary and may be manipuulated at the termination ofthe test to be disconnected from the liner and -the packer and removedfrom the well leaving the friable liner and packer in the well to bedrilled up by drilling tools.

Another object of this invention is to providean yimproved well testingapparatus that is operable to make an extended test of the productivityof the well to obtain an uncontaminated sample 40 of the well fluidwithout danger of obstructing the well or necessitating expensivefishing operations. The various objects'and features of our inventionwill be fully understood from the following 46 detailed description of atypical preferred form and application of our invention, throughoutwhich description reference is made to the accompanyingdrawings, inwhich: l

Fig. 1 is a side elevation of the principal parts 60 of one form ofapparatus of the present invention showing it in the operative positionin a well and illustrating the packer and the adjacent parts in verticalcross section. -Fig.- 2 is an enlarged longitudinal detailed sectionalview ofthe rotatable connection and the adjacent parts of the testershown in Fig-1. Fig. 3 is an enlarged vlongitudinal detailed sectionalview of the valve and the adjacent parts of the tester. Fig. 4 is atransverse detailed sectional view taken substantially as indicated byline 4 4 on Fig. 2. Fig. 5 is a viewv similar to Fig. 1 illustratinganother form of apparatus. Fig. 6 is an enlarged frag- The presentinvention as herein disclosed vre lates to the general class of welltesting apparatus described and claimed incur co-pending application`entitled Method and apparatus for testing Wells led December 11, 1935,Serial No. 53,922,

rat-hole H to the opening I8.

now Patent No. 2,138,057, granted November 29,

The apparatus of the present invention illustrated in Figs. 1 to 4,inclusive, of the drawings, A

includes, generally, a test string 45, a tubular body II), a screen-orliner II detachably connected with 'the body I0 and adapted to extendinto a rathole H inthe lower end of a well bore B, a packer I2associated with the liner I I to pack off the well at the upper end ofthe rat-hole H, a valve I3 in the body Ill for controlling the liow ofthe test fluid into the string 45, and a device I4 normally forming arotatable and slack connection between the test string 45 and the testerbody IIJ.

The test string 45 is provided to conduct the test uid upwardly from thetester to the surface of the ground. 'I'he string 45 may be madel up ofa' multiplicity of lengths of pipe'or tubing of suitable diameter.Thetester body I is a simple elongate tubular member which houses thevalve l I3landcarries the liner II and packer I2. The particular body I0illustrated in the drawings has a threaded pin I5 on -its upper end andhasa collar I6 threaded on its lower end. The threads connecting thecollar I6 with the body. I0 are preferably left hand threads orarepitchedn the opposite direction to the threads in the string 45. Asuitable'shear pin 9 may be arranged in openings in the body I0 andcollar I 6. An an- .nular inwardly projecting ange II is provided on theinterior of theb'ody I0 adjacent its upper end. 1.

The liner II is provided to receive the test uid or well fluid from thewell and to `conduct it upwardly into the body I0. The liner II is anelongate member proportioned to readily enter the rat-hole H. A'centrallongitudinal opening I8 is-provided in the liner II and spaced ports I9in the wall of the liner admit the fluid froml the In the preferredconstruction the liner I I is longitudinally tapered or of downwardlydiminishingl diameter to be readily pulled from the rat-hole H in theevent the rat-hole caves or sands up. The upper portion IIa of the linerII may be cylindrical and imperforate. -threaded into the coupling I5whereby the liner is secured to the lower end of the body I0. The linerII is preferably formed of cast iron, 'rubber composition, or othermaterial that may be readily broken up and drilled up by well drillingtools. v

''he packer I2 is provided to seal against the .shoulder X of earthlformation occurring at the upper end of the rat-hole H. The packer I2is` operable to engage the shoulder X. to seal the well rotation of thetester.

The upper endof the liner II is*- bore B from the rat-hole H whereby thefluid enteringthe liner IIand the body I0 is uncontaminated b'y therotarymud and fluid in the wellbore proper. The packer I2 is preferablyformed of a drillable material to be readily drilled up by drillingtools. In practice the packer I2 may be in the form of va tubular membersurrounding the upper portion IIa of the liner II. The packer I2 may beformed of ceinent, Bakelite, hardrubber composition, glass,lmarble orthe like. The packer I2 is proportioned to enter and pass through thewell bore B with suitable clearance. The lower end 2| of the packer I2is adapted to seat on the shoulder X. In the particular case illustratedin the drawings the shoul-ll der X is downwardly and inwardly taperedand the lower end 2| of the packer I2 is correspondingly tapered toproperly seat on. the shoulder. Fins or blades project from the lowerend 2I to dig or bite into the shoulder X to prevent A counterbore 22isprovided in the upper end of'the packer I2 to receive the coupling I6.l Packing 23 is arranged in the counterbore 22 to be compressed betweenthe 4bottom wall of the counterbore andthe lower lend of the couplingI6. When the weight, or a portion of the weight, of the test string 45and the associated parts is imposed on the packer I2 to force it againstthe seat X this force or weight is transmitted4 through the packing -23so that the packing tightly seals about the liner portion IIa andtightly seals against the interior of the packer I2. The blades 2U areforced into the formation to hold the tester against rotation when the Ldrillable-packer I2. The springs 24 are bowed or e' curved to bearinwardlylgagainst the portion IIa of the liner. inward force on theliner portion IIa to dependably hold the packer I2 on the liner whenthcapparatus is run into .the well and are adapted to yield when thepaeker-I2 is immovably caught and the liner II is moved upwardly. Abasket 25 may be provided on the packer I2 to seal with the side wall ofthe well bore B. The basket 25 may be formed of rubber or the like andis tubular. The sealing basket 25 surrounds the packer I2 and is ofsufficient length to project upwardly beyond the upper end `of thepacker.

The springs 24 exert a sufficient shiftable tube 26 arrangedlongitudinally w'ithin the body Il). -The valve tube 26 passes throughthe flange I 1 with suitable clearance. The longitudinal opening 21 ofthe valve tube 26 is open at its lower end to communicate with theinterior of the liner II. An integral c ap 28 closes the upper end ofthe opening 21. Packing packing 29. Circumferentially and longitudinallyspaced ports 3| are provided in the wall of the tube 26. 'I'he ports areadapted to be brought into communication with the opening 32 of the bodyI6 above the flange I1 when the tube 26 is moved upwardly relative tothe body. The

ports 3| are preferably of upwardly diminishing capacity havingupwardly' convergent side walls and are preferably staggered 'or oisetvertically. When the valvetube 26 is in its normal or closed positionthe cap 28 engages the upper side of the flange I1 and the ports 3| areall out of communication with the body opening 32 above the iiange I1.Means is provided forl yieldingly holding the valve tube 26 in its downor closedposition. A nut 33 is threaded on the lower portion of thevalve tube 26. A spring 34 surrounds the valve` tube 26 and is arrangedunder compression between the nut 33 andthe gland 36 to urge the tube 26downwardly to the position where the ports 3| are out of communicationwith the body opening 32 above the iiange I1.v p

Means is provided for controlling or operating the valve I3. `Inaccordance with the' broader aspects of theinvention the means foroperating theV valve I3 may be varied considerably. The particular valveoperating means illustrated ln the drawings includes a line or cable Cadapted to be run' through the test string 45 and a mandrel or rod' 35on the lower end of the cable C. A series of spring fingers 36 isprovided on the lower end of the rod `35. The spring lingers 36 havelugs 31 adjacent their lower ends. The lugs 31 have inclined upper andlower faces.

A `socket'38 is provided in the upper end of the cap 28 and is adaptedto receive the `iingers 36. An inwardly projecting annular ilange 39 isprovided o'n the wall of the socket 38 adjacent its upper end; Theflange 39 has a downwardly and inwardly inclined upper surface 46. Whenthe may be placed on the cable C to overcome the spring 34 and move thevalve tube 26 upwardly. The spring ngers 36 may be disengaged orreleased from the socket 38 by suddenly jerking or moving the cable Cupwardly with a comparatively heavy force. This disengagement` of thengers 36 from the socket 38 frees the cable C from the valve tube 26.

4 'Ihe liner II, the packer I2 and the valve means described above arespecifically described and claimed in our co-pending application,referred to above.

The rotatable connecting device I4 between the test string 45 and thetester body I6 includes a tubular member 46 on the string 45 and atubular member 4I on the body I6. The members 46 and 4I aretelescopically assembled and are related for relative rotation andlongitudinal movement so that either member can be moved a limiteddistance lengthwise or rotated independently of the other member. Anadapter or coupler`42 is threaded on the upper end of the member 46. Thecoupler 42 has a central longitudinal opening 43 `which is preferablytapered downwardly and inwardly. In the particular form of the inventionbeing described the member 46 is the outer part of the connecting deviceI4 and is tubular having a central longitudinal opening 44. The lowerend of the test string/46 is threaded on a pin. 46 on the upper end ofthe coupler 42. Ports 41 are provided in the pinl 46 and the coupler 42.In the form of the invention being described the ports 41 fare closed bysuitable plugs 8. The outer member 46 of the device I4 is providedbetween its ends with an annular internal flange 48. A nut or guide 49is threaded in the lower end of the member 46.

The inner member 4I of the device I4 is an elongate tubular part havinga central longitudinal opening 56. The member 4I is connected with theupper end of the body I6. In the construction illustrated irtl thedrawings a cap 5I is threaded on ther pin I5 on the upper end of thebody I6. The cap 5| has a reduced threaded opening 52 in its upperportion and the lower end of the member 4I is threaded into the opening52. The cap 5I may have' the same internal diameter as the body I6 andmay be considered as an extension ofthe body. The cap 5I is'ofsufficient length to receive the valve tube 26 when the valve tube ismoved upwardly to its open position. The member 4| projects upI wardlyfrom the capA 5I to extend through the guide 49 and the flange 48. Themember 4I is suitably guided in the guide 49 and the flange 48. Rings 1of packing are provided in the openings of the guide 49 and flange 48 toseal about the member 4 I. The passage or opening 56 of the member 4Imaintains the lower end of the string 45 in communication with theopening 32 of the body I6 above the flange I1. 'A collar or flange 54 isprovided onl the upper end of the member 4I. The flange 48 and theflange54 are adapted to cooperate to limit the relative longitudinal movementbetween the members 46 and 4I in one direction. The guide 49 and the cap5f are adapted to cooperate to limit the relative longitudinal movementbetween the members 46 and 4| in the other direction.

Clutch means are provided to connect the members 46 and 4I for thetransmission of rotation when in the extended position and when in thecontracted position.` Clutch parts 55 are dii provided on the upper sideof the flange 48 and l complementary clutch parts 56 are provided on theunder side of the flange 54. When the string 45 is moved upwardly theclutch parts 55 may be brought into cooperation with the clutch parts 56to connect the members 46 and 4| for the transmission of rotation. Whenthe clutch parts 55 and 56 are in cooperation the string 45 may beturned to turn the body I6 and theparts connected therewith. Suitableclutch parts 51 are provided on the lower side of the guide 49.Complementary clutchparts 58 may be provided on the upper end of the cap5I. When the string 45 is lowered the clutch parts 51 may be broughtinto cooperation with the clutch parts 58 to clutch the connectingdevice I4 for the transmission ofv rotation.

When the well is to be tested the body I6 carrying the liner II, thepacker' I2 and the valve I3 is connected with the lower end ofy thestring 45 by the rotatable connecting device I4. The string 45 is runinto the well bore B until the lower end 2| of the packer I2 engages theshoulder X of earth formation. When the packer I2 is in this positionthe liner Ilextends ofthe packer I2 the string 45 may be reciprocatedLor rotated, or both, to prevent it from becoming sanded or mudded in thewell. The device I4 allows this manipulation without disturbing thetester proper. The basket 25 of the packer I2 is expanded against thewall of the well bore B by the hydrostatic pressure in the well andeffects a tight seal between the well bore B and the rat-hole H.

Following the setting of the packer I2 the valve I3 is opened to placethe rat-hole H in communication with the test string 45. To open thevalve I3 the line or cable C is` run into the string 45 to have the rod35 pass downwardly through the openings 43 and 50 and to enter thespring,

ngers 36 in the socket 38. The lline-or cable C is raised and the lugs31 cooperate with the ange 39 to transmit the upward movement to thevalve tube 26. In this manner the valve tube 26 may be raised againstthe action of the spring 34. It is preferred to raise the valve tube 25slowly lso that the ports 3I are slowly broughtinto comthrough themember 4I into the string 45. T'he valve I3 may be opened slowly toprovide for the gradual reduction in pressure on the uid in the rat-holeH to reduce the possibility of caving or sanding up the rat-hole H. Thegradual opening of the valve I3. also may assist in preventing thepacker I 2 from being crushed or excessively wedged against theshoulderX. l

The uid inthe stratum penetrated by the rathole H may -flow in suicientquantities and under suicient pressure to pass upwardly through thestringv45 to the upper end of the well. In some cases it may benecessary to pump the test uid from the string 45. The test vstring 45is :adapted to receive the test uid produced from the formationpenetrated by the rat-hole H, which test uid is uncontaminated by themud or uid in the well bore B. .Subsequent to the opening of ther valveI3 or if desired subsequent to the setting of the packer I2, the string45 may be raised or brought to a position where the clutch parts 51 and58 and the clutch parts 55 and 56 are spaced apart. Whenthe string 45 isin this position it may be rotated or reciprocated freely withoutturning or disturbing the body IU- or the other parts of the tester.This movement of the string 45 may be continuous'throughout the test orthe string 45 may be rotated or reciprocated from time to time toprevent the string-from be-A cming frozen in the well.' Asis wellunderstood by those skilled in the art, the rotation and/orreciprocation of the string 45 will prevent the cuttings and sand'fromsettling out of the mud and accumulating about the string `45 and thestring is thus maintained free. As the test string 45 may be maintainedfree so longas the rotation or Vreciprocation of the string 45 iscontinued, a test of a long duration may be made.v

When a lsuiicient sample or test has been ob'; tained the cable C issuddenly raised to release the spring lingers 36 from the socket 381.Upon` the disengagement of the springE fingers 36 from the socket 38 thespring34 automaticall'yreturns the valve tube 42li to the closedpositionwhere the lower end of the head 28 seals against the flange I1.The string 45 may thenberaised to remove the testing apparatus from thewell.

When the packer I2 andthe liner II are not sanded or caught in the wellthe string 45 may be readily pulled upwardly to remove the entiretesting apparatus from the well. `The .liner II is tapered so that itmaybe easily pulled from the rat-hole H even though the rat-hole may becaved or sanded up. In the event that the packer I2 is immovably caughtin the wellthe string 45 may be pulled upwardly towithdraw 'the liner II through the packer I2. 'Ihe springs 24 yield to permit this withdrawalof the liner II through the 'packer I2.

If desired or'believed necessary the string 45 may be suddenly raised tobring the -clutch parts 55 into jarring engagement with the clutch parts56 to provide an upward jarring action or the string 45 may be suddenlydropped to bring the clutch parts 51 into jarring engagement withthe-clutch parts 58. This jarring of the testing apparatus may free thecaught liner or packer from the well. If the packer I2 is xed vor caughtin the well and the liner is withdrawn through the packer, as abovedescribed, the testing apparatus may be removed from the well leavingthe packer seated on the shoulder X. As the packer I2 is formed of adrillable material it may be readily drilled up by suitable drillingtools to leave the well unobstructed for further operations. v

In the event that the packer I2 and the liner II, or either one of them,is immovably caught in the well, it may be desired to unthread the bodyAIll'from the liner to allow the body I0, the valve I3 and the rotatableconnection I4 to be withdrawn from the well on the string 45.l

or may be lowered to bring the clutch parts 51,

into engagement with the clutch parts 58. Fol,-

-lowing this raising or' lowering of the string 45 the string is rotatedto break the shear pin 3 and unthread the lower end of the body I0 fromthe coupling I5. Following the disconnectionI of the body I0 from theliner II the string 45 togethei with the body III andrdevice I4 may beremoved from the well leaving the drillable liner II and packer I2 inthe, well bore. The liner and packer may be readily drilled up bysuitable drilling tools to leave the well bore free and unobstructed.The string may be rotated or reciprocated when possible or practical toassist in maintainingv the string 45 free.

Figs. 5, 6 and 7 of the drawings illustrate a form ofthe inventionwherein circulation may be maintained in the well throughout the use or,

operation of the device or tester. The apparatus illustrated in Figs. 5,6 and 7 includes, generally, a tubular circulation string S, a teststring 45, atubular body Ille, a liner II, a packer'IZ associated withthe liner II, a valve I3a in the in Figs. 1 to 4, inclusive, of thedrawings, and corresponding reference numerals are applied mation beingtested and to conduct this fluid to the surface of the ground or toretain the test fluid as the case may be. The test string 45 extendslongitudinally through the string S with suitable clearance to leave apassage for the free flow of the circulation fluid.

The body III is connected with the lower end of the test string 45 andis provided to house'the valve |3. The body I0 is an elongate tubularstructurel arranged longitudinally within the string S. In theconstruction illustrated in the drawings a pin 63 is provided on theupper end of the body III and is threaded into the lower end of the teststring 45 whereby the .body I0 forms a continuation of the test string.An annular internal flange I1 is provided on the body I0 adjacent itsupper end. A nipple 6I is provided on the lower end of the body IIIandpresents a downwardly facig annular shoulder 62. The nipple 6| has adownwardly and inwardly tapered part 63 projecting from its lower end.

The valve I3 is provided to govern the admission of the test fluid tothe lower end of the test string 45. The valve I3 is housed in the bodyI and is similar to the valve I 3 described above. The valve I3 includesa tube 26 having a longitudinal opening 21 closed at its upper end by acap 28. The tube 26 shiftably or slidably passes through the ange I1lLongitudinally and circumferentially spacedports 3| of upwardlydiminishing capacity are provided in the wall of the tube 26. The ports3| have upwardly convergent side walls and normally `communicate withthel interior of the body I0 below its flange |1. Thehead 26 has adownwardly facing valve surface 64 adapted to seat 64 cooperates withtheflange |1.

against the iiange I1 to close off communication between the lower endof the test string 45 and the interior of the body I0 below the flange.Means is provided for yieldingly urging the valve tube 26 to its downposition where the surface A nut 33 is threaded on the lower end ofthevalve'tube 26. A nut 30 is threaded in the body I0 below the ange I1. Aspring 34 surrounds the valve tube 26 and is arranged under compressionbetween the nuts 33 and 36. Packing 29 is compressed between the nut 30and the flange I1 to seal about the valve tube 26` Means is provided forfacilitating the `raising 'be received in a socket 38 in the head .26. A

flange 39 is provided on the wall of Athe socket 38 adjacent its upperend. When the line or cable C1 is run downwardly through the string 45the fingers 31 enter the flaring upper end of the socket 362i.4 'I'hefingers 31 flex inwardly past the flange 39 under the weight of the rod35.

The springiingers 31 are adapted to cooperate with the under side of theflange 39 to connect the cable C1 with the valve tube 26 whereby thecable may be raised to bring the 4ports 3l into communication with thetest string 45'.

The connecting device I4 forms a 4connection between the strings 45 andS and the liner |I and is such that the strings may be rotatedandreciprocated during the testing operation without shifting or disturbingthe liner II orl the packerv I2. In accordance with the form of `the.invention being described the device I4 is such that circulationv may bemaintained in the well throughout the test. The connecting device I4.includes a tubular member 40 secured to the lower end of the string Sand a tubular member 4I secured to the liner I I.

The members 46 and 4I are telescopically `related, for relative rotationand longitudinal movement. A pin 65 is provided on the upper end of themember 40 and an adapter or coupier 42 is threaded on the pin 65. A pin46 on the upper end of the coupler 42 is threaded into the lower end' ofthe circulation string S. The coupler 42 may be identical with the abovedescribed coupler 42. The socket 43 in the upper end of the coupler 42is adapted to receive the tapered part 63 of the nipple 6|. The

socket 43 is tapered downwardly. and inwardly and packing rings 66 areprovided in the socket. to seal with the nipple part 63. A packingwasher 61 is arranged between the shoulder 62 and the upper end of thecoupler 42 to insure a tight seal betweenA the coupler and the nipple6I. and the pin 46 to conduct the circulation fluid from the string S'to the well bore. It is to be noted that the ports 41 discharge thecirculation fluid into the well bore B a short distance above the packerI2 to maintain circulation in substantially theentire well bore.' Theouter member 40 has an internal flange 48 between its ends. A guide 49is threaded `in the lower end of the member 4IJ.

The inner member 4 I of the device I4 is connected with the upper end ofthe liner II. In the preferred construction illustrated, a coupling I6is threaded on the upper end of the liner I I and has a reduced opening68 in its upper end. The lower end of the member 4| is threaded into theopening 68. 'Ihe threads of the member 4I and the opening 68 arepreferably lefthand threads whereby the member 4I may be unthreaded fromthe coupling I6 without disturbng the threaded connections in the stringS and the other parts of the apparatus. In practice a suitable shear pinmay be arranged in openings in the coupling I6 and the member 4|. Themember 4 I extends upwardly from the coupling I6 to shiftably passthrough the guide 49 and the flange 48, Packing rings 1 are -provided inthe openings of the guide 49 and the flange 48 to seal about the member4|.

Clutch means are provided on the members 40 and 4i for the transmissionof rotation when it is desired to unthread the member 4I from thecoupling I6 or when for any reason it is desirable to rotate the tester.A ange 54 is provided on the upper end of the member 4I and carriesclutch parts 56. Complementary clutchv parts 55 are provided on theupper side of the flange 48. The clutch parts 56 and 55 may be engagedby raising the string S whereupon the string S may be rotated totransmit rotation to the member 4|. Clutch parts 51 are provided on thelower side of the guide 49 and complementary clutch parts 58 areprovided on the upper end of the coupling I6. The

Ports 41 are provided in the coupler 42A clutch parts 51a may be engagedwith the clutch v parts 58'by moving thestring S downwardly.

mation 'Ihe weight or a portion of thev weight of the string .S may beimposed on the packer I2 it is desired to open the valve Iiin to admitthe to force the blades 20 into the earth vformation. Following thisseating of the packer I2 the test string A58 carrying the body I0 mayberun into the string S. The tapered part 63.15 adapted to enter andseat in the socket 43 to support the body III and the string 45a. Thepart 63 seatedl in the socket 4 3 is effectively sealed about by thepacking rings 66and the washer 61. When test fluidto the string 45a, thecable C1 carrying the rod :i is run into the string 45'. As abovevdescribed the spring fingers 31 are adapted to enter the socket 38a andcooperate with the flange 39H' for the transmission of upward force tothe tube 26a.- 'I'he cable C1 may be raised to move the tube 26upwardly. 'Ihe upward movement of the tube 26a uncovers the ports 3laabove lthe liange I'IEL placing the interiorI of the tube incommunication with the test string 45. This allows the test fluid to owupwardly from the rat-hole H into the test string 458.

Immediately upon the setting of the string 45, and thereafter,circulation iiuid may be pumped downwardly through the string, S todischarge from the .ports 41,` .This circulation-fluid flowing throughthe well vbore B prevents the string S from becoming sanded or frozen inthe well end of the test string- 45.

of the valve I3 the test string 45* containing.

bore. If desired or found necessary the string S may be rotatedcontinuously during the test or, if desired, the string S may bereciprocated. The device I4El is such that the string S, carrying the4string 45, may be rotated and/or reciprocated at will throughout thetest operation without moving or disturbing the liner II or the packerI2. In this manner the string S is provented from becoming stuck orfrozen in the well bore B.

When a suicient test has been obtained the cable C1 maybe suddenlyraised to free the spring n'gers 311i from the socket 38 whereupon thecable C1 may bewithdrawn from the well.

The spring 34B automatically moves the valve tube 26 downwardly to bringthe surface 64 against the .flange I1. This closes the lower Followingthe closing the test iluid may be withdrawn from the well bore.Following the removal of the string y45|, the string S may Abe withdrawnfrom the well. In most instances the string S may be merely pulledupwardly to carry with itthe liner II and the' packer I2. In some casesit maybe found necessary to turn orV jar the liner II and the packer I2to free them for removal. The string S may be moved longitudinally toengage the clutch parts 51 and 58, or the clutch parts 55'l vand 56B,vwhereuponthe string S may be rotated. lThe clutch parts transmit therotation of the liner II which in turn may transmit the rotation to thepacker I2. The rotation of thev liner and packer may free them forremoval.

To impart a jarring action to the test equipment `the string S may be'reciprocated to bring the it may become necessary to disconnect thestring S from the liner II. To disconnect the string S from the liner IIthe string S is moved either up or down to engage the clutch parts. Thestring S is then rotated in a direction to unthread the member 4Iab fromthe opening 6l. The rotation of the string breaks the shear pin A10.Upon the unthreading of the member 4I* from the opening 68 the string Scarrying vthe device I4a may be removed from the well. This leaves theliner II and the packer I2 in the well bore. The liner andI packer areformed of drillable materials and may be easily drilled up by suitabledrilling tools to leave the well bore unobstructed forfurtherpperations. A

Having described only typical preferred forms and applications of ourinvention we do not wish to be limited orrestricted to the specificdetails herein set forth, but wish to reserveto ourselves any variationsor modifications that may appear to those skilled in the art or fallwithin the scope ofthe following claims. l

vHaving described our invention, weclaim:

1. Well testing.apparatus'including a tubular test string, a tubularbody, a liner for receiving fluid from the well, a connection betweenthe body and liner releasable by rotation, a packer associated with theliner to pack oi thewell, a valve in the body for controlling the flowof fluid from the liner to the string, and a swivel con-y valve in thebody for controlling the flow of fluid from the liner to the string..and a swivel connection between the body and string comprising twotubular iluid conducting members telescopi; cally related for freerela-tive rotative and limited longitudinal movement. and parts on the.members engageable by relative longitudinal movement between themembers to transmit rotation to release the rst mentioned connection.

3. Well testing apparatus including a tubular test string, a tubularbody, a liner for receiving fluid from the well, a connection betweenthe body and liner releasable -by rotation, a packer associated with theliner to pack oil' the well, a valve in the body for controlling theflow of iiuid from the liner to the string, a swivel connection betweenthe body and string allowing rotation of the string relative to thebody, the swivel connection including parts engageable bymanipulation ofthe string to transmit rotation to the body to vrelease the rs'tmentioned connection, and kan element passed through the string' and theswivel connection to control the valve.

4. Well testing apparatusincluding a liner for receiving fluid from thewell, Aa packer associated with the liner` and operable to pack oif thefor relative rotation a-nd longitudinal movement 'tubular circulationstring for carrying circulation fluid, said strings beingv one withinthe other and both extending downward to adjacent the@ liner and aconnection rotatably connecting the lower ends of said'strings `with theliner and discharging the circulation iluid into the well.

5. Well testing apparatus including a liner fork reciving fluid from thewell, a packer associated with the liner and operable to pack ofi `thewell, a'test string for receiving the test iluid, a tubular circulationstring for carrying circulation iluid, and a connection rotatablyconnecting said stringswith the liner and discharging the circulationiiuid into the well, said connection comprising, two telescopicallyassociated members related for relative rotationone of said membersbeing connected with the said strings and having a port for dischargingthe circulation fluid, the other member being tubular and connected withthe liner to conduct the test iiuid therefrom to the test string.

6. Well testing apparatus including a liner for receiving uid from thewell, a packer associated with the liner and operable to pack off thewell, a test string for receiving the test fluid, a tubular circulationstring extending downwardly around the teststring to a point adjacentthe liner for carrying circulation rluid, a valve in the ltest string,and a rotatable fluid conducting connection between the liner and thelower ends of the circulation string and the said test string.

7. Well testing apparatus including a liner for related for relativerotation fand longitudinal movement, one member being connected with thestring, and having a port in communication with the string and openingto the exteriors of said members for discharging iluid` into the well,the other member being connected with the tool, and

clutch parts on the members engageable for the with the strings, theother member connected4 with the tester, the rst mentioned member havinga port for discharging the circulation fluid in the well, and parts onthe members engageable for the transmission of rotation.

11. Anapparatus for making formation'tests in wells comprising .atubular test string of pipe, packing means, on the test string ,forisolating the lower portion of the well to be tested from the upperportion, valve means adjacent the packing means for keeping the teststring dry while the" apparatus is being lowered into the well, andmeans adapted to be introduced through the test string and connected tothe valve means -for openingtheyalve means after the packing means hasbeen seated.

12. An apparatus for making formation tests in'wells comprising atubular test string-of pipe,

receiving fluid from the well, a packer associated 'ppacking means" onthe "test string for isolating tion between the second mentioned memberand# the liner. y V

8. Well testing apparatus including a liner for receiving fluid from`the well, a packer associated with the liner and operable to pack offthe well,V a test string for receiving the test fluid, a tubularcirculation string for carrying circulation iiuid,

.a valve in the test string, and aV rotatable fluid conductingconnection between the linerand said strings, said connectioncomprising, a member connected with said strings and having a port fordischarging the circulation fluid into the well, a member related to thefirst mentioned member and operable to conduct the test iluid from theliner to the`test string, a connection between the second mentioned m'emr and the liner releasable by. rotation, and parts' on the membersengageable by relativelongitudinal movement to transmit rotationfor'releasing the last named A connection from the liner.

9. In combination, an operating string, a well' tool.and'meanslrotatably connecting the string Vand the tool, said meansincluding, two members the lower portion of the well to be tested fromthe upper portion, valve means adjacent the packing means for keepingAthe test string dry while the apparatus is being lowered into the well,

` and means adapted to beintroduced through the test string andconnected to the valve means for opening the valve means after thepacking means has been seated, the connection between the test stringand the packing means. being such as to -permit rotation of the teststring while the packlng means remains seated so as to prevent stick-ling of the test string.

13. Well testing apparatus including a liner for receiving fluid fromthe well, a packer asso,

ciated with the liner to pack ofi the well, a tubular test string, andmeans releasably and' rotatably connecting the test string with theliner whereby the string may be rotated freely and contive longitudinalposition, onemember being secured to the test string, readily releasablethreads connecting the other member with the liner, a shea-r pinnormally connecting the said other member and the liner against relativerotation, and clutch parts on the members cooperable to transmitrotation to break the shear pin and unthread the threads and thus detachthe said other memberl from the liner.

ELWIN B.`HALL.

